// define('TWEEN', function () {
    /**
     * Tween.js - Licensed under the MIT license
     * https://github.com/tweenjs/tween.js
     * ----------------------------------------------
     *
     * See https://github.com/tweenjs/tween.js/graphs/contributors for the full list of contributors.
     * Thank you all, you're awesome!
     */

    var TWEEN = TWEEN || (function () {

        var _tweens = [];

        return {

            getAll: function () {

                return _tweens;

            },

            removeAll: function () {

                _tweens = [];

            },

            add: function (tween) {

                _tweens.push(tween);

            },

            remove: function (tween) {

                var i = _tweens.indexOf(tween);

                if (i !== -1) {
                    _tweens.splice(i, 1);
                }

            },

            update: function (time, preserve) {

                if (_tweens.length === 0) {
                    return false;
                }

                var i = 0;

                time = time !== undefined ? time : TWEEN.now();

                while (i < _tweens.length) {

                    if (_tweens[i].update(time) || preserve) {
                        i++;
                    } else {
                        _tweens.splice(i, 1);
                    }

                }

                return true;

            }
        };

    })();


    // Include a performance.now polyfill.
    // In node.js, use process.hrtime.
    if (typeof (window) === 'undefined' && typeof (process) !== 'undefined') {
        TWEEN.now = function () {
            var time = process.hrtime();

            // Convert [seconds, nanoseconds] to milliseconds.
            return time[0] * 1000 + time[1] / 1000000;
        };
    }
    // In a browser, use window.performance.now if it is available.
    else if (typeof (window) !== 'undefined' &&
        window.performance !== undefined &&
        window.performance.now !== undefined) {
        // This must be bound, because directly assigning this function
        // leads to an invocation exception in Chrome.
        TWEEN.now = window.performance.now.bind(window.performance);
    }
    // Use Date.now if it is available.
    else if (Date.now !== undefined) {
        TWEEN.now = Date.now;
    }
    // Otherwise, use 'new Date().getTime()'.
    else {
        TWEEN.now = function () {
            return new Date().getTime();
        };
    }


    TWEEN.Tween = function (object) {

        var _object = object;
        var _valuesStart = {};
        var _valuesEnd = {};
        var _valuesStartRepeat = {};
        var _duration = 1000;
        var _repeat = 0;
        var _repeatDelayTime;
        var _yoyo = false;
        var _isPlaying = false;
        var _reversed = false;
        var _delayTime = 0;
        var _startTime = null;
        var _easingFunction = TWEEN.Easing.Linear.None;
        var _interpolationFunction = TWEEN.Interpolation.Linear;
        var _chainedTweens = [];
        var _onStartCallback = null;
        var _onStartCallbackFired = false;
        var _onUpdateCallback = null;
        var _onCompleteCallback = null;
        var _onStopCallback = null;

        this.to = function (properties, duration) {

            _valuesEnd = properties;

            if (duration !== undefined) {
                _duration = duration;
            }

            return this;

        };

        this.start = function (time) {

            TWEEN.add(this);

            _isPlaying = true;

            _onStartCallbackFired = false;

            _startTime = time !== undefined ? time : TWEEN.now();
            _startTime += _delayTime;

            for (var property in _valuesEnd) {

                // Check if an Array was provided as property value
                if (_valuesEnd[property] instanceof Array) {

                    if (_valuesEnd[property].length === 0) {
                        continue;
                    }

                    // Create a local copy of the Array with the start value at the front
                    _valuesEnd[property] = [_object[property]].concat(_valuesEnd[property]);

                }

                // If `to()` specifies a property that doesn't exist in the source object,
                // we should not set that property in the object
                if (_object[property] === undefined) {
                    continue;
                }

                // Save the starting value.
                _valuesStart[property] = _object[property];

                if ((_valuesStart[property] instanceof Array) === false) {
                    _valuesStart[property] *= 1.0; // Ensures we're using numbers, not strings
                }

                _valuesStartRepeat[property] = _valuesStart[property] || 0;

            }

            return this;

        };

        this.stop = function () {

            if (!_isPlaying) {
                return this;
            }

            TWEEN.remove(this);
            _isPlaying = false;

            if (_onStopCallback !== null) {
                _onStopCallback.call(_object, _object);
            }

            this.stopChainedTweens();
            return this;

        };

        this.end = function () {

            this.update(_startTime + _duration);
            return this;

        };

        this.stopChainedTweens = function () {

            for (var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++) {
                _chainedTweens[i].stop();
            }

        };

        this.delay = function (amount) {

            _delayTime = amount;
            return this;

        };

        this.repeat = function (times) {

            _repeat = times;
            return this;

        };

        this.repeatDelay = function (amount) {

            _repeatDelayTime = amount;
            return this;

        };

        this.yoyo = function (yoyo) {

            _yoyo = yoyo;
            return this;

        };


        this.easing = function (easing) {

            _easingFunction = easing;
            return this;

        };

        this.interpolation = function (interpolation) {

            _interpolationFunction = interpolation;
            return this;

        };

        this.chain = function () {

            _chainedTweens = arguments;
            return this;

        };

        this.onStart = function (callback) {

            _onStartCallback = callback;
            return this;

        };

        this.onUpdate = function (callback) {

            _onUpdateCallback = callback;
            return this;

        };

        this.onComplete = function (callback) {

            _onCompleteCallback = callback;
            return this;

        };

        this.onStop = function (callback) {

            _onStopCallback = callback;
            return this;

        };

        this.update = function (time) {

            var property;
            var elapsed;
            var value;

            if (time < _startTime) {
                return true;
            }

            if (_onStartCallbackFired === false) {

                if (_onStartCallback !== null) {
                    _onStartCallback.call(_object, _object);
                }

                _onStartCallbackFired = true;
            }

            elapsed = (time - _startTime) / _duration;
            elapsed = elapsed > 1 ? 1 : elapsed;

            value = _easingFunction(elapsed);

            for (property in _valuesEnd) {

                // Don't update properties that do not exist in the source object
                if (_valuesStart[property] === undefined) {
                    continue;
                }

                var start = _valuesStart[property] || 0;
                var end = _valuesEnd[property];

                if (end instanceof Array) {

                    _object[property] = _interpolationFunction(end, value);

                } else {

                    // Parses relative end values with start as base (e.g.: +10, -3)
                    if (typeof (end) === 'string') {

                        if (end.charAt(0) === '+' || end.charAt(0) === '-') {
                            end = start + parseFloat(end);
                        } else {
                            end = parseFloat(end);
                        }
                    }

                    // Protect against non numeric properties.
                    if (typeof (end) === 'number') {
                        _object[property] = start + (end - start) * value;
                    }

                }

            }

            if (_onUpdateCallback !== null) {
                _onUpdateCallback.call(_object, value);
            }

            if (elapsed === 1) {

                if (_repeat > 0) {

                    if (isFinite(_repeat)) {
                        _repeat--;
                    }

                    // Reassign starting values, restart by making startTime = now
                    for (property in _valuesStartRepeat) {

                        if (typeof (_valuesEnd[property]) === 'string') {
                            _valuesStartRepeat[property] = _valuesStartRepeat[property] + parseFloat(_valuesEnd[property]);
                        }

                        if (_yoyo) {
                            var tmp = _valuesStartRepeat[property];

                            _valuesStartRepeat[property] = _valuesEnd[property];
                            _valuesEnd[property] = tmp;
                        }

                        _valuesStart[property] = _valuesStartRepeat[property];

                    }

                    if (_yoyo) {
                        _reversed = !_reversed;
                    }

                    if (_repeatDelayTime !== undefined) {
                        _startTime = time + _repeatDelayTime;
                    } else {
                        _startTime = time + _delayTime;
                    }

                    return true;

                } else {

                    if (_onCompleteCallback !== null) {

                        _onCompleteCallback.call(_object, _object);
                    }

                    for (var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++) {
                        // Make the chained tweens start exactly at the time they should,
                        // even if the `update()` method was called way past the duration of the tween
                        _chainedTweens[i].start(_startTime + _duration);
                    }

                    return false;

                }

            }

            return true;

        };

    };


    TWEEN.Easing = {

        Linear: {

            None: function (k) {

                return k;

            }

        },

        Quadratic: {

            In: function (k) {

                return k * k;

            },

            Out: function (k) {

                return k * (2 - k);

            },

            InOut: function (k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k;
                }

                return - 0.5 * (--k * (k - 2) - 1);

            }

        },

        Cubic: {

            In: function (k) {

                return k * k * k;

            },

            Out: function (k) {

                return --k * k * k + 1;

            },

            InOut: function (k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k;
                }

                return 0.5 * ((k -= 2) * k * k + 2);

            }

        },

        Quartic: {

            In: function (k) {

                return k * k * k * k;

            },

            Out: function (k) {

                return 1 - (--k * k * k * k);

            },

            InOut: function (k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k * k;
                }

                return - 0.5 * ((k -= 2) * k * k * k - 2);

            }

        },

        Quintic: {

            In: function (k) {

                return k * k * k * k * k;

            },

            Out: function (k) {

                return --k * k * k * k * k + 1;

            },

            InOut: function (k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k * k * k;
                }

                return 0.5 * ((k -= 2) * k * k * k * k + 2);

            }

        },

        Sinusoidal: {

            In: function (k) {

                return 1 - Math.cos(k * Math.PI / 2);

            },

            Out: function (k) {

                return Math.sin(k * Math.PI / 2);

            },

            InOut: function (k) {

                return 0.5 * (1 - Math.cos(Math.PI * k));

            }

        },

        Exponential: {

            In: function (k) {

                return k === 0 ? 0 : Math.pow(1024, k - 1);

            },

            Out: function (k) {

                return k === 1 ? 1 : 1 - Math.pow(2, - 10 * k);

            },

            InOut: function (k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                if ((k *= 2) < 1) {
                    return 0.5 * Math.pow(1024, k - 1);
                }

                return 0.5 * (- Math.pow(2, - 10 * (k - 1)) + 2);

            }

        },

        Circular: {

            In: function (k) {

                return 1 - Math.sqrt(1 - k * k);

            },

            Out: function (k) {

                return Math.sqrt(1 - (--k * k));

            },

            InOut: function (k) {

                if ((k *= 2) < 1) {
                    return - 0.5 * (Math.sqrt(1 - k * k) - 1);
                }

                return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);

            }

        },

        Elastic: {

            In: function (k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                return -Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI);

            },

            Out: function (k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                return Math.pow(2, -10 * k) * Math.sin((k - 0.1) * 5 * Math.PI) + 1;

            },

            InOut: function (k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                k *= 2;

                if (k < 1) {
                    return -0.5 * Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI);
                }

                return 0.5 * Math.pow(2, -10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI) + 1;

            }

        },

        Back: {

            In: function (k) {

                var s = 1.70158;

                return k * k * ((s + 1) * k - s);

            },

            Out: function (k) {

                var s = 1.70158;

                return --k * k * ((s + 1) * k + s) + 1;

            },

            InOut: function (k) {

                var s = 1.70158 * 1.525;

                if ((k *= 2) < 1) {
                    return 0.5 * (k * k * ((s + 1) * k - s));
                }

                return 0.5 * ((k -= 2) * k * ((s + 1) * k + s) + 2);

            }

        },

        Bounce: {

            In: function (k) {

                return 1 - TWEEN.Easing.Bounce.Out(1 - k);

            },

            Out: function (k) {

                if (k < (1 / 2.75)) {
                    return 7.5625 * k * k;
                } else if (k < (2 / 2.75)) {
                    return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
                } else if (k < (2.5 / 2.75)) {
                    return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
                } else {
                    return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
                }

            },

            InOut: function (k) {

                if (k < 0.5) {
                    return TWEEN.Easing.Bounce.In(k * 2) * 0.5;
                }

                return TWEEN.Easing.Bounce.Out(k * 2 - 1) * 0.5 + 0.5;

            }

        }

    };

    TWEEN.Interpolation = {

        Linear: function (v, k) {

            var m = v.length - 1;
            var f = m * k;
            var i = Math.floor(f);
            var fn = TWEEN.Interpolation.Utils.Linear;

            if (k < 0) {
                return fn(v[0], v[1], f);
            }

            if (k > 1) {
                return fn(v[m], v[m - 1], m - f);
            }

            return fn(v[i], v[i + 1 > m ? m : i + 1], f - i);

        },

        Bezier: function (v, k) {

            var b = 0;
            var n = v.length - 1;
            var pw = Math.pow;
            var bn = TWEEN.Interpolation.Utils.Bernstein;

            for (var i = 0; i <= n; i++) {
                b += pw(1 - k, n - i) * pw(k, i) * v[i] * bn(n, i);
            }

            return b;

        },

        CatmullRom: function (v, k) {

            var m = v.length - 1;
            var f = m * k;
            var i = Math.floor(f);
            var fn = TWEEN.Interpolation.Utils.CatmullRom;

            if (v[0] === v[m]) {

                if (k < 0) {
                    i = Math.floor(f = m * (1 + k));
                }

                return fn(v[(i - 1 + m) % m], v[i], v[(i + 1) % m], v[(i + 2) % m], f - i);

            } else {

                if (k < 0) {
                    return v[0] - (fn(v[0], v[0], v[1], v[1], -f) - v[0]);
                }

                if (k > 1) {
                    return v[m] - (fn(v[m], v[m], v[m - 1], v[m - 1], f - m) - v[m]);
                }

                return fn(v[i ? i - 1 : 0], v[i], v[m < i + 1 ? m : i + 1], v[m < i + 2 ? m : i + 2], f - i);

            }

        },

        Utils: {

            Linear: function (p0, p1, t) {

                return (p1 - p0) * t + p0;

            },

            Bernstein: function (n, i) {

                var fc = TWEEN.Interpolation.Utils.Factorial;

                return fc(n) / fc(i) / fc(n - i);

            },

            Factorial: (function () {

                var a = [1];

                return function (n) {

                    var s = 1;

                    if (a[n]) {
                        return a[n];
                    }

                    for (var i = n; i > 1; i--) {
                        s *= i;
                    }

                    a[n] = s;
                    return s;

                };

            })(),

            CatmullRom: function (p0, p1, p2, p3, t) {

                var v0 = (p2 - p0) * 0.5;
                var v1 = (p3 - p1) * 0.5;
                var t2 = t * t;
                var t3 = t * t2;

                return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (- 3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;

            }

        }

    };

//     return TWEEN;
// });





